Evelyn Irsay, a tiny, beloved “bundle of energy” who worked at the New York Post until age 90, has passed away after a brief illness, her family said.

“She was frail but still feisty,” said son James Irsay, of his 101-year-old mother. “The day before she died, a doctor had wanted to swab her nose,” he recalled. “She said, ‘If you touch me, I’ll call the police!’”

The 5-foot-1 Irsay “made loyal friends” wherever she worked, said James, 71.

“She had a very sharp, finely honed intellect. She was always willing to help people when she was needed.”

Irsay worked at the Post for 30 years, serving as the director of Human Resources. She also was the assistant to journalist Max Lerner, who published a syndicated column for The Post.

“She was devoted to Max Lerner and was clearly a necessary force in shepherding his books to publication,” James Irsay said.

When she retired on July 28, 2006, her colleagues created a mock front page as a fond send-off. The headline read, “30 years & still not finished!”

Her Post colleagues adored her.

“She was such a pip,” recalled researcher Liz Pressman. “Eighty years old and she used to come into work in white low top sneakers and a black dress. Young at heart always!”

Claudia Anthony, a 31-year Post employee and former receptionist, called Evelyn “a busy little bee, running here and running there. I thought she was 10 years younger.”

Anthony said Irsay worked on the ninth floor of the newspaper’s office at 1211 Sixth Avenue, but frequently ran up to collect attendance and vacation forms from staff on the 10th floor.

“Evelyn was all over the place,” she said. “Everything was completely different then. Everything was manual.”

“She was a one-person HR department,” marveled Myron Rushetzky, a former Post support staff supervisor, who worked at the paper for 35 years.

“It took three people to replace her. She was in her 90s and you wouldn’t know it. She had a big smile and big personality. She was right out of central casting.”

In her copy of Lerner’s book, “It Is Later Than You Think: The Need for a Militant Democracy,” the author inscribed, “For Evelyn, who made this new edition possible, as you have made all my writing possible for a decade and more of joyful association. With great affection, Max Lerner.”

Born Evelyn Panish in Hartford, Conn., on June 11, 1917, she was the daughter of Max Panish, a cantor from Romania who composed Jewish liturgical music despite being deaf.

Her mother, Minnie, was from Odessa in Ukraine.

She was raised in Maspeth, Queens, and the Bronx and also lived in Brighton Beach, where she and her husband of 51 years, Leonard, brought up their three sons, Kenneth, Peter and James.

“Her love of music was passed along to her children,” James said.

The family relocated to Fresh Meadows in 1952 and then Buffalo for several years and later Levittown, Long Island, in 1958.

The Irsays moved to Howard Beach in 1963 and then Manhattan Beach before settling in West End Avenue on the Upper West Side.

Leonard Irsay died in 1993.

Evelyn Irsay leaves behind sons James and son Kenneth, grandson Stephen Irsay and a a great-great grandson, Sebastian Irsay.

She died on Aug. 21 at Lenox Hill Hospital. A memorial service is pending.